This work is part of the U.S. Geological Survey's, National Water Quality Assessment Program. We are conducting a habitat survey by looking at stream morphology. We make various measurements like stream width, bed substrate, velocity, bank height and angle, tree cover, etc. We look at this at ten transects within a defined reach. We do this survey a couple of times a year to look for changes. For more information: water.usgs.gov/nawqa/about.html